public function testAddCurl()
 {
     $curl = new Curl\Curl();
     $curl->setUrl(Test::TEST_URL);
     $curl->setOpt(CURLOPT_CUSTOMREQUEST, 'GET');
     $curl->setOpt(CURLOPT_HTTPGET, true);
     $multi_curl = new MultiCurl();
     $multi_curl->addCurl($curl);
     $multi_curl->start();
 }